脉冲等离子爆炸工艺表面改性H13钢

发布时间：2018-04-29 01:06

本文选题：脉冲等离子爆炸 + 表面改性　；参考：《钢铁》2017年02期

【摘要】：为研究脉冲等离子爆炸工艺制备H13钢(4Cr5Mo Si V1)表面改性层的组织和性能,通过对显微组织形貌、相结构、残余应力、硬度和耐磨性的分析,对脉冲等离子爆炸工艺的改性机制和影响进行了讨论。结果表明,脉冲等离子爆炸工艺使H13钢表面发生快速熔凝和快速淬火过程,在材料表面形成厚度均匀、组织致密、高硬度的改性层;改性层中马氏体细化,同时由于不同物理变化过程分别形成残余奥氏体和逆变奥氏体;随着脉冲次数的增加,材料表面的残余应力经历了由压应力先增大后减小然后转变成拉应力的过程;改性层的厚度和硬度随脉冲次数的增加而提高,但同时表面熔化程度加剧,表层低硬度熔凝区厚度增加。当脉冲次数为8次时,H13钢具有最优的耐磨损性能。
[Abstract]:In order to study the microstructure and properties of H13 steel (4Cr5Mo Si V 1) surface modified layer prepared by pulsed plasma explosion, the microstructure, phase structure, residual stress, hardness and wear resistance were analyzed. The modification mechanism and influence of pulsed plasma explosion are discussed. The results show that the pulsed plasma explosion process results in rapid melting and quenching process on the surface of H13 steel, resulting in uniform thickness, dense microstructure, high hardness and fine martensite in the modified layer. At the same time, the residual austenite and the inverse austenite are formed in different physical processes, and the residual stress on the surface of the material increases first and then decreases and then changes to tensile stress with the increase of pulse number. The thickness and hardness of the modified layer increase with the increase of pulse number, but the melting degree of the surface increases and the thickness of the low hardness melting zone increases. The H13 steel has the best wear resistance when the pulse number is 8 times.
【作者单位】：江西省铜钨新材料重点实验室;上海市现代冶金与材料制备重点实验室;南昌航空大学材料科学与工程学院;
【基金】：国际科技合作资助项目(2013DFR50900) 江西省对外科技合作计划资助项目(20121BDH80031、20133BDH80012) 江西省科技支撑计划资助项目(20151BBB50264)
【分类号】：TG178

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